[PATCH 003/115] drm/radeon: don't use get_engine_clock() on APUs

From: Luis Henriques
Date: Mon May 20 2013 - 07:18:29 EST -stable review patch. If anyone has any objections, please let me know.


From: Alex Deucher <alexander.deucher@xxxxxxx>

commit bf05d9985111f85ed6922c134567b96eb789283b upstream.

It doesn't work reliably. Just report back the currently
selected engine clock.

Partially fixes:

Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
drivers/gpu/drm/radeon/radeon_pm.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 0c4ca48..c7f3d6c 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -864,7 +864,11 @@ static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
struct radeon_device *rdev = dev->dev_private;

seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
- seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
+ /* radeon_get_engine_clock is not reliable on APUs so just print the current clock */
+ if ((rdev->family >= CHIP_PALM) && (rdev->flags & RADEON_IS_IGP))
+ seq_printf(m, "current engine clock: %u0 kHz\n", rdev->pm.current_sclk);
+ else
+ seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
if (rdev->asic->pm.get_memory_clock)
seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));

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